There is a need to demonstrate that the Gudair vaccine is an effective means of preventing the spread of Johne’s Disease.
a) To determine the frequency of OJD in two South African resource flocks by ELISA, faecal culture and postmortem methods.
b) To determine the impact of vaccination for OJD on the status of resource flock animals derived from ELISA, faecal culture and postmortem methods.
c) To study the genetics and genomics of susceptibility to OJD.